Dredging apparatus.



Slagen-Shen l.

Guion/ms IIIII Patented Aug. 6, I90.

.i. L eAnwoon. DREDGWG APPARATUS. (Appnum mad m. u 1901) (No Model.)

No. 679,738. Patented Aug. s, lam.

. .1. L. zAnwuou.V

nnename APPARATUS.

(Applicationled Feb. U, 1901.)

(No Model.) 2 Sheets-Sheet 2.

Hara/00% ATENT Erice.

JOSHUA L. GARVVOOI), OF BUTTE, MONTANA.

DREDGING APPARATUS.

SPECIFICATION forming part 0f Letters Patent No. 679,738, dated August 6, 1901.

Application led February 5, 1901. Serial No. 46,094. (No model.)

dredges or shovels for mining and other ex` cavation work.

One object of the invention is to provide a` dredge which is comparatively simple of construction, easily and quickly operated, capable of being conveniently transported, and adapted for both land and harbor work; and

a further object is to provide a telescoping dredge which when elevated will automatically discharge the load by gravity, the sections of the dredge serving as conductors through which the load passes to the point of deposit, whereby quickness of operation is insured. y

With these and other minor objects in view, which will appear as the nature of theinvention is better understood, the invention consists of certain novel features of construction, combination, and arrangement of parts, as will be hereinafter more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a side elevation of a telescopic dredge einbodying my invention, showing the shovel lowered for loading. Fig. 2 :is a similar view showing the dredge elevated for dumping. Fig. 3 is a top plan View. Fig. 4 is a vertical longitudinal section. Fig. 5 is across-section on line 5 5 of Fig. 3.

Like reference characters designate corresponding parts throughout the several views.

The numeral l inthe drawings represents a base or supporting column in which is mounted a king-bolt 2, carrying one member of a turn-table 3, on which the dredge is adapted to swing in a horizontal plane and laterally of its carriage, which maybe either a boat-such, for instance, as the ordinary dredging-scoW-or a car, the other member of said turn-table being fixed to the top of said posite ends, and of suoli size as to snugly fit one within the other, as clearly shown in Figs.

'4 and 5; but it will of course be understood that pipes or conductors of any suitable crosssectional form may be employed. The section 6 is adapted to slide freely in the section 5 and is guided and limited in its movement by longitudinal guide and brace bars 8,

mounted to slide in guideways 9 upon the outer sides of the section 5 and connected at their outer ends to the shovel 4'l' or outer extremity of said section G. Rollers l0 are provided at the front end of the main stationary section 5 tobear upon the under side of the said sliding section 6 to insure ease of movement of the latter and prevent undue friction and binding. Arranged upon the upper surface of the main section or conductor 5 are guides 11, inV which travela crosshead 12, which is connected to the shovel or outer end of the sliding section or conductor 6 by means of connecting-rods 13. The crosshead is connected to the outer end of a pistonrod 111, carried by a piston 15, working in a steam or other duid pressure cylinder 16, mounted upon the inner end of the main conductor 9 and connected with a steam-chest 17, provided with a controlling-valve 1S. Steam or other fluid pressure is supplied in practice to the chest 17 through the medium of suitable connections from a boiler or other source of fluid-pressure supply located on the dredge car, scow, or other dredge carrier or support, and the valve 18 is arranged so as to be conveniently operated by an attendant seated upon or stationed near the inner end o f the main section 5. The valve is of the three-way type and controls the supply and exhaust of steam. Cushioned stops 19 are provided upon or adjacent to the outer end of the cylinder to prevent injury by jar or concussion from the cross-head 12 when the dredge is discharging.

The-dredge is raised and lowered through the medium of hoisting-cables 2O and 2l. The cable 20 is attached at its outer end to a bail 22 upon the shovel '7 and the cable 2l to a similar bail 23 upon the outer end of the sliding conductor-section 6. These cables in a complete organized structure extend back to the dredge-carrier over pulleys suitably arranged and Wound around hoisting-drums of different diameters mounted upon a common shaft, said drums being driven by an engine of approved construction.

In operation the dredge is first lowered by the hoisting-cables to the required angle and the sliding section 6 then fed out by admitting steam to the inner end of the cylinder until the shovel or scoop comes in contact with the dirt or ground, when the movement of the cables is reversed and the entire device raised to take up the load. The raising movement is then-continued until the shovel passes upwardly beyond the horizontal, when the load passes from the shovel into the sliding section 5, which acts as a chute down which the load flows by gravity and discharges from the inner end of the section 5 into the body of the car, hold of the scow, or a suitable receptacle. Upon the admittance of steam to the cylinder the cross-head is forced outwardly under the action of the piston and by means of the connecting-rods projects the conductor-section 6 from its inclosing section 5. When the device is elevated, the section 6 automatically telescopes into section 5.

From the foregoing description, taken in connection with the accompanying drawings, the construction and mode of operation of the invention will be readily understood. By mounting the dredge so as to swing in both a vertical and horizontal plane it will be readily perceived that the device may be readily and conveniently turned for excavating to the right or left of its carriage, and by constructing the parts so as to telescope it will be apparent that the device may be easily handled and valuable space and time economized in transportation.

` The invention will be found of great value in mining, owing to its compactness and the readiness with which it may be moved from place to place and within a minimum amount of space.

The Weight of the device may be approximately counterbalanced by Weights applied to the cable 21, if desired.

Changes in the form, proportion, and minor details of construction may be made within the scope of the invention without departing from the spirit or sacrificing any of the advantages thereof.

Having thus described my invention, what l claim, and desire to secure by Letters Patent, is-

l. A dredge comprising a main conductorsection mounted to swing in vertical and horizontal planes, a sliding section adapted to telescope therein, said sections adapted to serve as conveyers through which the load is adapted to discharge by gravity when the dredge is raised,`a shovel carried by the sliding section, means for guiding and limiting the outward movement of the sliding section, and means mounted upon the fixed section for projecting said sliding section, substantially as described.

2. In a dredge, the combination of a support, a relatively fixed conductor section mounted to swing in vertical and horizontal planes upon said support, a sliding section adapted to telescope therein, said conductorsections serving as conveyers for the discharge .of the load by gravity therethrough when the dredge is raised, a shovel carried by the sliding section, guide and brace bars slidably-connected to the fixed conductorsection and also connected to the sliding conductor-section to guide and brace and limit the outward movement of the latter, means for raising and lowering the dredge, a cylinder mounted upon the fixed section, a piston in said cylinder, a cross-head sliding in guides on the fixed conductor-section and connected to the piston-rod, and connecting-rods between said cross-head and the sliding conductor-section, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOSHUA L. GARWOOD.

Witnesses:

O. D.4 WooDMAN, OURT. C. DARRow.

IOO 

